1
|
Drzewicz A, Jasiurkowska-Delaporte M, Juszyńska-Gałązka E, Deptuch A, Gałązka M, Zając W, Drzewiński W. On relaxation and vibrational dynamics in the thermodynamic states of a chiral smectogenic glass-former. Phys Chem Chem Phys 2022; 24:4595-4612. [PMID: 35132977 DOI: 10.1039/d1cp05048f] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article shows the full characteristics (i.e., the phase situation as well as the relaxation and vibrational dynamics) of the (S)-4'-(1-methyloctyloxycarbonyl)biphenyl-4-yl 4-[5-(2,2,3,3,4,4,4-heptafluorobutoxy)pentyl-1-oxy]-benzoate chiral liquid crystal. Besides two enantiotropic chiral smectic phases (SmC* and ), the compound under study also forms the hexatic smectic phase and two crystal phases (Cr1 and Cr2). The XRD patterns imply a similar structure of both crystal phases. The sample crystallizes upon slow cooling, while the phase undergoes a glass transition during fast cooling. Upon subsequent heating, cold crystallization is observed. Our research reveals the complex relaxation dynamics in the identified thermodynamic states, e.g., two relaxations up to the beginning of cold crystallization, three modes in the crystal phases and seven processes in all smectic phases. The results from the scaling of the dielectric response indicate that the origin of the dynamics and behavior of the dielectric permittivity is the same for all phases, regardless of the change in temperature and/or external biasing field. The high value of the fragility index (mf ≈ 146) indicates that the compound under study is a fragile glass-forming system. The region of the -COO- and -COC- group stretching vibrations is primarily sensitive to the structural changes occurring during phase transitions.
Collapse
Affiliation(s)
- Anna Drzewicz
- Institute of Nuclear Physics Polish Academy of Sciences, PL-31342 Kraków, Poland.
| | | | - Ewa Juszyńska-Gałązka
- Institute of Nuclear Physics Polish Academy of Sciences, PL-31342 Kraków, Poland. .,Osaka University, 565-0871 Osaka, Japan
| | - Aleksandra Deptuch
- Institute of Nuclear Physics Polish Academy of Sciences, PL-31342 Kraków, Poland.
| | - Mirosław Gałązka
- Institute of Nuclear Physics Polish Academy of Sciences, PL-31342 Kraków, Poland.
| | - Wojciech Zając
- Institute of Nuclear Physics Polish Academy of Sciences, PL-31342 Kraków, Poland.
| | - Witold Drzewiński
- Institute of Chemistry, Military University of Technology, PL-00908 Warszawa, Poland
| |
Collapse
|
2
|
Rozwadowski T, Jasiurkowska-Delaporte M, Massalska-Arodź M, Yamamura Y, Saito K. Designing the disorder: the kinetics of nonisothermal crystallization of the orientationally disordered crystalline phase in a nematic mesogen. Phys Chem Chem Phys 2020; 22:24236-24248. [PMID: 33084672 DOI: 10.1039/d0cp04002a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article presents the molecular dynamics and solidification behavior of a 2,3-difluoro-4-propylphenyl 2,3-difluoro-4-(4-pentylcyclohexyl)benzoate nematic liquid crystal (5C4FPB3) observed by broadband dielectric spectroscopy (BDS) and differential scanning calorimetry (DSC). Polarized optical microscopy (POM) is also performed to confirm the phase transition temperatures. Our investigation reveals rare crystallization of the orientationally disordered crystal (ODIC) phase from the nematic phase and a glass transition of the crystal at cooling rates higher than 1 K min-1. The deconvolution of the dielectric spectra with derivative techniques is necessary because of the complex molecular dynamics in the crystalline phase. The BDS method enables us to capture the relaxation processes reflecting pre-crystallization molecular movements. The kinetics of nonisothermal crystallization is studied using the Ozawa, Mo, and isoconversional methods. The present studies suggest that the dominant factor of the crystal growth mechanism depends on the cooling rate. Two types of crystallization mechanisms are identified at cooling rates lower and higher than 5 K min-1. We design a diagram with crystallization and glass transition borders against the cooling rates. Estimations show that crystallization of the present compound can be bypassed at cooling rates higher than 78 kK min-1, at which a glass transition of the nematic phase occurs. We show various scenarios of the molecular order and the crystallization mechanism designed based on the process rate.
Collapse
Affiliation(s)
- Tomasz Rozwadowski
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan. and Institute of Nuclear Physics Polish Academy of Sciences, PL-31342 Krakow, Poland
| | | | | | - Yasuhisa Yamamura
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
| | - Kazuya Saito
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
| |
Collapse
|
3
|
Grigoriadi K, Wübbenhorst M, Breemen LCA, Putzeys T, Gennaro A, Anderson PD, Hütter M. Transient dynamics of cold‐rolled and subsequently thermally rejuvenated atactic‐polystyrene using broadband dielectric spectroscopy. JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1002/pol.20190068] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kalouda Grigoriadi
- Polymer Technology, Department of Mechanical EngineeringEindhoven University of Technology Eindhoven The Netherlands
- Dutch Polymer Institute Eindhoven The Netherlands
| | | | - Lambèrt C. A. Breemen
- Polymer Technology, Department of Mechanical EngineeringEindhoven University of Technology Eindhoven The Netherlands
| | | | | | - Patrick D. Anderson
- Polymer Technology, Department of Mechanical EngineeringEindhoven University of Technology Eindhoven The Netherlands
| | - Markus Hütter
- Polymer Technology, Department of Mechanical EngineeringEindhoven University of Technology Eindhoven The Netherlands
| |
Collapse
|
4
|
Jasiurkowska-Delaporte M, Rozwadowski T, Juszyńska-Gała Zka E, Krawczyk J, Dmochowska E, Kula P, Massalska-Arodź M. Relaxation dynamics and crystallization study of glass-forming chiral-nematic liquid crystal S,S-2,7-bis(4-pentylphenyl)-9,9-dimethylbutyl 9H-fluorene (5P-Am *FLAm *-P5). THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2019; 42:121. [PMID: 31506850 DOI: 10.1140/epje/i2019-11887-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 08/09/2019] [Indexed: 06/10/2023]
Abstract
The chiral nematic S,S-2,7-bis(4-pentylphenyl)-9,9-dimethylbutyl9H-fluorene (5P-Am*FLAm*-P5) liquid crystal shows a complex phase diagram strongly dependent on thermal treatment as identified by Polarizing Optical Microscopy (POM) and differential scanning calorimeter (DSC). The molecular dynamics in various thermodynamics states was studied by means of broadband dielectric spectroscopy (BDS). The vitrification of a chiral nematic phase (N*) is manifested by a Vogel-Fulcher-Tammann (VFT)-type temperature dependence of structural relaxation time ([Formula: see text]). Three dielectric relaxation processes exhibiting Arrhenius-like thermal activation were found in conformationally disordered (condis) Cr1 and Cr2 structures. The isothermal cold crystallization process of Cr2 occurs in the metastable N* phase; however, in the non-isothermal experiments, the Cr2 phase is formed in the isotropic phase obtained on heating the metastable N* phase. The findings for the isothermal process were compared with those regarding non-isothermal crystallization.
Collapse
Affiliation(s)
| | - Tomasz Rozwadowski
- Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, 31-342, Kraków, Poland
| | - Ewa Juszyńska-Gała Zka
- Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, 31-342, Kraków, Poland
| | - Jan Krawczyk
- Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, 31-342, Kraków, Poland
| | - Ewelina Dmochowska
- Institute of Chemistry, Military University of Technology, Warsaw, Poland
| | - Przemysław Kula
- Institute of Chemistry, Military University of Technology, Warsaw, Poland
| | - Maria Massalska-Arodź
- Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, 31-342, Kraków, Poland
| |
Collapse
|
5
|
Maria TMR, Rosado MTS, Oliveira MF, Bebiano SS, Castro RAE, Juszyńska-Gałązka E, Ramos Silva M, Canotilho J, Eusébio MES. Polymorphism of 1,3-cyclohexanediols: molecular structure and plastic crystal formation of cyclohexanediol isomers. CrystEngComm 2019. [DOI: 10.1039/c9ce00186g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Different plastic crystal formation abilities of cyclohexanediol isomers interpreted with Hirshfeld surfaces.
Collapse
Affiliation(s)
| | | | | | | | | | - Ewa Juszyńska-Gałązka
- The Henryk Niewodniczański Institute of Nuclear Physics
- Polish Academy of Sciences
- Kraków
- Poland
| | | | - João Canotilho
- CQC
- Department of Chemistry
- University of Coimbra
- Portugal
- Faculty of Pharmacy
| | | |
Collapse
|
6
|
Jasiurkowska-Delaporte M, Napolitano S, Leys J, Juszyńska-Gałązka E, Wübbenhorst M, Massalska-Arodź M. Glass Transition Dynamics and Crystallization Kinetics in the Smectic Liquid Crystal 4-n-Butyloxybenzylidene-4'-n'-octylaniline (BBOA). J Phys Chem B 2016; 120:12160-12167. [PMID: 27809533 DOI: 10.1021/acs.jpcb.6b06303] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The molecular dynamics of 4-n-butyloxybenzylidene-4'-n'-octylaniline (BBOA, abbreviated also as 4O.8) was studied by broadband dielectric spectroscopy (BDS) for samples that were exposed to various thermal treatments. Phase transitions between liquid crystalline phases (N, SmA, SmBhex, and SmBCr) were evidenced by abrupt changes in the temperature dependence of the dielectric permittivity spectra and dielectric relaxation times. A particularly complex dynamic behavior was revealed for the highly ordered SmBCr phase that showed clear evidence for cooperative dynamics of a glass-forming liquid as manifested by a Vogel-Fulcher-Tammann (VFT)-type temperature dependence of its structural relaxation time τ(T). At low temperatures, dependence τ(T) again changes from VFT to Arrhenius behavior, a phenomenon commonly observed for supercooled liquids confined to nanometer length scales and occasionally discussed as strong-fragile transition on heating. In this context, our observation supports the idea of partial orientation disorder in a quenched SmBCr phase, where the length scale of cooperative motions is restricted to the nanometer size of glassy domains causing the deviation from "bulk" VFT-type behavior. Finally, the isothermal crystallization kinetics of the metastable SmBCr phase was studied in detail. On the basis of structural information about the SmBhex and SmBCr phases, determined by X-ray diffraction, the subtle relation between molecular order and relaxation behavior is discussed.
Collapse
Affiliation(s)
| | - Simone Napolitano
- Department of Physics and Astronomy, Soft Matter and Biophysics Section, KU Leuven , Celestijnenlaan 200D, B-3001 Leuven, Belgium.,Laboratory of Polymer and Soft Matter Dynamics, Faculté des Sciences, Université Libre de Bruxelles (ULB) , Boulevard du Triomphe, Bruxelles 1050, Belgium
| | - Jan Leys
- Department of Physics and Astronomy, Soft Matter and Biophysics Section, KU Leuven , Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - Ewa Juszyńska-Gałązka
- The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences , Radzikowskiego 152, 31-342 Kraków, Poland
| | - Micheal Wübbenhorst
- Department of Physics and Astronomy, Soft Matter and Biophysics Section, KU Leuven , Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - Maria Massalska-Arodź
- The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences , Radzikowskiego 152, 31-342 Kraków, Poland
| |
Collapse
|
7
|
Dhotel A, Chen Z, Sun J, Youssef B, Saiter JM, Schönhals A, Tan L, Delbreilh L. From monomers to self-assembled monolayers: the evolution of molecular mobility with structural confinements. SOFT MATTER 2015; 11:719-731. [PMID: 25466448 DOI: 10.1039/c4sm01893a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The effect of structural constriction on molecular mobility is investigated by broadband dielectric spectroscopy (BDS) within three types of molecular arrangements: monomers, oligomers and self-assembled monolayers (SAMs). While disordered monomers exhibit a variety of cooperative and local relaxation processes, the constrained nanodomains of oligomers and highly ordered structure of monolayers exhibit much hindered local molecular fluctuations. Particularly, in SAMs, motions of the silane headgroups are totally prevented whereas the polar endgroups forming the monolayer canopy show only one cooperative relaxation process. This latter molecular fluctuation is, for the first time, observed independently from other overlapping dielectric signals. Numerous electrostatic interactions among those dipolar endgroups are responsible for the strong cooperativity and heterogeneity of the canopy relaxation process. Our data analyses also revealed that the bulkiness of dipolar endgroups can disrupt the organization of the monolayer canopy thus increasing their ability to fluctuate as temperature is increased.
Collapse
Affiliation(s)
- Alexandre Dhotel
- AMME-LECAP, EA4528, International Lab., Av. de l'Université, B.P. 12, Normandie Univ. France, Université and INSA Rouen, 76801 Saint Etienne du Rouvray, France.
| | | | | | | | | | | | | | | |
Collapse
|
8
|
Quesada-Cabrera R, Filinchuk Y, McMillan PF, Nies E, Dmitriev V, Meersman F. Exploring the pressure–temperature behaviour of crystalline and plastic crystalline phases of N-isopropylpropionamide. CrystEngComm 2015. [DOI: 10.1039/c5ce00032g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The phase behaviour of crystalline and plastic crystalline phases of N-(isopropyl)propionamide (NiPPA) has been investigated by X-ray diffraction and a tentative P,T diagram has been constructed.
Collapse
Affiliation(s)
- R. Quesada-Cabrera
- Christopher-Ingold Laboratories
- Department of Chemistry
- University College London
- London, UK
| | - Y. Filinchuk
- Institute of Condensed Matter and Nanosciences (IMCN)
- Université Catholique de Louvain
- B-1348 Louvain-la-Neuve, Belgium
| | - P. F. McMillan
- Christopher-Ingold Laboratories
- Department of Chemistry
- University College London
- London, UK
| | - E. Nies
- Division of Molecular and Nanomaterials
- Department of Chemistry
- Katholieke Universiteit Leuven
- Leuven, Belgium
| | - V. Dmitriev
- Swiss-Norwegian Beam Lines
- European Synchrotron Radiation Facilities
- F-38043 Grenoble Cedex, France
| | - F. Meersman
- Christopher-Ingold Laboratories
- Department of Chemistry
- University College London
- London, UK
- Biomolecular & Analytical Mass Spectrometry group
| |
Collapse
|
9
|
Bebiano SV, Rosado MT, Castro RA, Ramos Silva M, Canotilho J, Maria TM, Eusébio MES. Polymorphism of cis-1,4-cyclohexanediol, a new plastic crystal former. Considerations on isomeric cyclohexanediols plastic crystal forming abilities. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2014.02.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
10
|
Wang H, Wu X, Liu CS, Zhu Z, Ao Z, Zhang G. Dynamics in N-Isopropylacrylamide-acrylic Acid Copolymer Aqueous Solution from Mechanical Spectroscopy. J Phys Chem B 2012; 116:13411-5. [DOI: 10.1021/jp306531b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Huaguang Wang
- Key Laboratory of Materials
Physics, Institute of Solid State Physics, Chinese Academy of Sciences, P.O. Box 1129, Hefei, Anhui, People’s
Republic of China
| | - Xuebang Wu
- Key Laboratory of Materials
Physics, Institute of Solid State Physics, Chinese Academy of Sciences, P.O. Box 1129, Hefei, Anhui, People’s
Republic of China
| | - C. S. Liu
- Key Laboratory of Materials
Physics, Institute of Solid State Physics, Chinese Academy of Sciences, P.O. Box 1129, Hefei, Anhui, People’s
Republic of China
| | - Zhengang Zhu
- Key Laboratory of Materials
Physics, Institute of Solid State Physics, Chinese Academy of Sciences, P.O. Box 1129, Hefei, Anhui, People’s
Republic of China
| | - Zhuo Ao
- Hefei
National Laboratory for
Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei,
P. R. China 230026
| | - Guangzhao Zhang
- Hefei
National Laboratory for
Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei,
P. R. China 230026
| |
Collapse
|
11
|
Li R, Pan C, Xiong S, Yu G, Wang P, Zou Y, Zhang A. Highly Disordered Crystalline-Phase Transition of Tetrakis(1-adamantanecarboxymethyl)methane. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2012. [DOI: 10.1246/bcsj.20110345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Rong Li
- College of Chemistry and Chemical Engineering, Central South University
| | - Chunyue Pan
- College of Chemistry and Chemical Engineering, Central South University
| | - Shaohui Xiong
- College of Chemistry and Chemical Engineering, Central South University
| | - Guipeng Yu
- College of Chemistry and Chemical Engineering, Central South University
| | - Pingshan Wang
- College of Chemistry and Chemical Engineering, Central South University
| | - Yingping Zou
- College of Chemistry and Chemical Engineering, Central South University
| | - Aiqing Zhang
- School of Chemistry and Materials Science, South-Central University for Nationalities
| |
Collapse
|